July-August 1879, Alaska Trip Image 58
of surface features will be plain to all who are capable and willing to make the necessary observations. The theory that the channels and corresponding bounding walls are corrugations effected by primary foldings of the rock, subsidences, elevations, etc., has not one fact for its support. These isl...
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| Format: | Text |
| Language: | English |
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Scholarly Commons
1879
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| Online Access: | https://scholarlycommons.pacific.edu/jmj-all/1438 https://scholarlycommons.pacific.edu/context/jmj-all/article/2437/type/native/viewcontent/fullsize.jpg |
| Summary: | of surface features will be plain to all who are capable and willing to make the necessary observations. The theory that the channels and corresponding bounding walls are corrugations effected by primary foldings of the rock, subsidences, elevations, etc., has not one fact for its support. These islets are fragments so evidently, one mass stratification cleavage. General rock characters show this at a glance, while in the case of those of resisting material as gneiss, granite, metamorphic states, etc., the waves beating upon them since they were created have not yet wasted them { Sketch: Small glacier flowing N.W. contained between ridges carved from one mountain mass and terminated at the head by two equal peaks where the glacial action was of necessity least. Once of course a tributary of the main Stickeen glacier. The general trend of the tributary canons is very interesting as showing how ranges are cut through and followed by rivers when backed by ice sheet that prevents an outlet inland, thus: { Sketch: showing ice sheet, ocean, range cut through arrows indicate tributary trends. } https://scholarlycommons.pacific.edu/jmj-all/2437/thumbnail.jpg |
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